Nissan Motor Company Limited

Atsuhiko Gotou

Hirotaka Kusukawa

Yoshiyuki Fukuda

Norio Iida

Satoshi Mizuya

Shigeo Murata

A first casing structure defines an atmospheric chamber between a transfer and a transmission. A second casing structure defines a transfer chamber containing a transfer mechanism of the transfer, and further defines a connecting passage through which the transfer chamber is connected to the atmospheric chamber. A gas-liquid separating device is interposed between the transfer chamber and the connecting passage so that the transfer chamber and the connecting passage are connected through the gas-liquid separating device.

Breather structure for transfer

The present invention provides an apparatus for estimating clutch temperature estimates clutch temperatures that closely follow actual clutch temperature without a temperature sensor and at low cost. The apparatus employs method for calculating energy applied to the driving clutch according to the detected rotational speed difference and estimated torque and method for estimating a clutch temperature variation based on the calculated energy and estimating a clutch temperature based on the estimated clutch temperature variation.

Apparatus for estimating clutch temperature

To achieve a first object of the present invention, a starting time limit vehicle speed which preferentially permits a torque distribution to front and rear wheels at the time of starting of a vehicle is switched in accordance with a degree of a diameter difference. To achieve a second object of the present invention, when the vehicle makes a normal running with different-diameter tires mounted thereon, a front/rear wheel distribution torque caused by a front/rear wheel rotation speed difference owing to the different-diameter tires is limited by switching a torque gain depending on a degree of a diameter difference.

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Kanagawa-ken, Japan

Atsuhiko Gotou